Roundabouts are often safer than traditional signalized intersections. The tight circle of a roundabout forces drivers to slow down, and the most severe types of intersection crashes - right-angle, left-turn, and head-on collisions - are unlikely. In addition, the center of the circle provides an opportunity for a gateway feature such as a sign or public art. Once accustomed to using a roundabout, many people prefer them because they keep traffic moving.